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// -*- C++ -*-
//=============================================================================
/**
* @file ORB_Table.h
*
* $Id$
*
* @author Ossama Othman <ossama@uci.edu>
* @author Carlos O'Ryan <coryan@uci.edu>
*/
//=============================================================================
#ifndef TAO_ORB_TABLE_H
#define TAO_ORB_TABLE_H
#include /**/ "ace/pre.h"
#include "tao/TAO_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Hash_Map_Manager_T.h"
#include "ace/Null_Mutex.h"
// Forward declarations.
class TAO_ORB_Core;
/**
* @class TAO_ORB_Table
*
* @brief Keep a table with all the ORBs in the system.
*
* CORBA::ORB_init() is supposed to return the same ORB if the
* user specifies the same ORBid, either in the ORB_init()
* parameter or in the -ORBid option.
* This class is used to implement that feature.
* It is also useful when trying to determine if an object
* reference is collocated or not.
*
* @note This class should be instantiated via its instance() method.
* Normally this would be enforced by making the constructor
* protected but that forces a friend declaration containing a
* template type (TAO_Singleton) with a static member to be
* introduced. In turn, this potentially introduces problems in
* MS Windows DLL environments due to the occurance of multiple
* singleton instances. There should only be one!
*/
class TAO_Export TAO_ORB_Table
{
public:
/// Constructor
/**
* @note See the note in the class description for an explanation of
* why this constructor is not protected.
*/
TAO_ORB_Table (void);
/// destructor
~TAO_ORB_Table (void);
typedef ACE_Hash_Map_Manager_Ex<const char *, TAO_ORB_Core *, ACE_Hash<const char *>, ACE_Equal_To<const char *>, ACE_Null_Mutex> Table;
typedef Table::iterator Iterator;
/// The canonical ACE_Map methods.
//@{
Iterator begin (void);
Iterator end (void);
int bind (const char *orb_id, TAO_ORB_Core *orb_core);
TAO_ORB_Core* find (const char *orb_id);
int unbind (const char *orb_id);
TAO_ORB_Core* const * get_orbs( size_t& num_orbs );
//@}
/// Obtain the first ORB for the ORB_Core_instance() implementation
TAO_ORB_Core *first_orb (void);
/// Return a unique instance
static TAO_ORB_Table *instance (void);
/// Set the ORB related to the orb_id as the default ORB and not the
/// ORB that is first binded.
void set_default (const char *orb_id);
/// Method the ORB invokes to specify that it doesnt want to be the
/// default ORB if there are more than one ORB registered.
void not_default (const char *orb_id);
/// Accessor to the underlying table_
Table * table (void);
private:
/// Prevent copying
ACE_UNIMPLEMENTED_FUNC (TAO_ORB_Table (const TAO_ORB_Table &))
ACE_UNIMPLEMENTED_FUNC (void operator= (const TAO_ORB_Table &))
private:
/// Update our list of orbs
void update_orbs();
/// Variable to check if the first ORB decides not to be the default
bool first_orb_not_default_;
/// The implementation.
Table table_;
/// The first ORB created by the user
TAO_ORB_Core *first_orb_;
/// List of orbs for get_orbs call
TAO_ORB_Core **orbs_;
size_t num_orbs_;
};
#if defined (__ACE_INLINE__)
# include "tao/ORB_Table.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_ORB_TABLE_H */
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